Thanks! Didn't like there old test kits but the new ones are good. Its a little expensive to start the program but I like it so far. They have a video on there website that is really interesting on how corals derive their colors based on key elements in the water column. the colors test kit was around $70 and the supplement pack is $20. Its based on potassium, iron and iodine and how it works with calcium alk and magnesium.